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Structure-Directing Interplay Between Tetrel and Halogen Bonding in Co-Crystal of Lead(II) Diethyldithiocarbamate with Tetraiodoethylene

Overview
Journal Int J Mol Sci
Publisher MDPI
Date 2022 Oct 14
PMID 36233178
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Abstract

The co-crystallization of the lead(II) complex [Pb(SCNEt)] with tetraiodoethylene (CI) gave the co-crystal, [Pb(SCNEt)]∙½CI, whose X-ray structure exhibits only a small change of the crystal parameters than those in the parent [Pb(SCNEt)]. The supramolecular organization of the co-crystal is largely determined by an interplay between Pb⋯S tetrel bonding (TeB) and I⋯S halogen bonding (HaB) with comparable contributions from these non-covalent contacts; the TeBs observed in the parent complex, [Pb(SCNEt)], remain unchanged in the co-crystal. An analysis of the theoretical calculation data, performed for the crystal and cluster models of [Pb(SCNEt)]∙½CI, revealed the non-covalent nature of the Pb⋯S TeB (-5.41 and -7.78 kcal/mol) and I⋯S HaB (-7.26 and -11.37 kcal/mol) interactions and indicate that in the co-crystal these non-covalent forces are similar in energy.

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